分布式光伏发电对配电网电压的影响及电压越限的解决方案Influence of Distributed Photovoltaic Generation on Voltage in Distribution Network and Solution of Voltage Beyond Limits
许晓艳;黄越辉;刘纯;王伟胜;
摘要(Abstract):
从电网电压降落角度研究光伏发电接入配电网前后电网电压的变化,分别分析单个和多个光伏发电接入对配电网电压的影响,得出了光伏发电接入后将使线路电压升高,且线路某点电压变化趋势与该点后所有负荷大小和光伏发电出力有直接关系的结论,探讨了影响电压变化的各种因素,如光伏出力大小、接入位置、电网线路参数、负荷大小等。通过算例验证了上述分析的正确性,并提出了解决分布式光伏发电引起电压越限的措施和方案,包括电抗器补偿、线路中央控制和逆变器无功控制结合、安装储能装置等。
关键词(KeyWords): 光伏发电;配电网;电压越限;无功补偿;储能装置
基金项目(Foundation): 国家博士后科学基金项目(20090450343);; 国家电网公司科技项目(B11-10-007)
作者(Author): 许晓艳;黄越辉;刘纯;王伟胜;
Email:
DOI: 10.13335/j.1000-3673.pst.2010.10.021
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